Improvement in shaft-couplings



duidt rzte tiene ermj JAMES BLESSING, 0F ALBANY, NEW YORK, ASSGNOR T0HIMSELE AND TOWNSEND & J AGKSON, @ESAME PLACE. l

Letters Patent No. 113,728, dated April 18, 1871.

IMPROVEMENT IN SHAFT-COUPLINGS.

The Schedule referred to in these Letters Patent and making of the same.

T o all whom t may concern Be it known that I, J AMES H. BLEssING, ofAlbany, in the county of Albany and State of New York, have invented anew and improved Coupling for Shafting; and Ido hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had'to the accompanying drawing making part of this specification,in whichv Figure-'1 is a side view of two sections of shafting connectedtogether by my improved plan. g

Figure 2 is a diamctrical section Vthrough the same.

Figure 3 is a cross-section.

Figure 4 is a perspective view of the gib or coupling-plate.

liigure 5 is a perspective of the end of one of the shaft sections.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to an improved mode of connecting sections'ofshafting, and consists in the combination of a gib, a sleeve, and a keywith shafts, the ends of which are slotted transversely at f anddiametrically at a.

The transverse slots f intersectthe diamet'i-ical slots a at rightangles, as shown by iig. 5.

G represents a gib or coupling-plate which exactly fits into the twodiametrical slots, al a, of the two shafts, A A, and which isconstructed with segments g g on two of its corners on the same edge,which exactly tit into the transverse grooves f of the two shafts.

The plate Gr is wider than the diameter of lthe shafts A A, as shown infigs. 2 and 3, and is received into a groove, c, which is madelongitudinally into a tapering key, C

This plate G with its segments and projecting portion prevents the twoshafts from separating longitudinally, and it prevents the shafts frombeing twisted at their joint under ordinary strain. lhe Hat portion ofthe gib G prevents the shaft-s from being twisted about their axes,while the segments y g prevent sep- :tration of the shafts endwise.

In addition to the gib I employ a very. strong sleeve, B, and a key, O.'

The sleeve B is bored through centrally to receive the ends of the twoshafts, A A, and this bore through the sleeve is slotted on a taperlettered b, to

quently the key cannot be removed from its place While it is inelosed byth'e collar B. A g

rlhe key 0 not only receives the projecting end of the gib G but itenters a tapering groove in the sleeve B, and when driven home preventsthis sleeve from slipping from its place endwise.

It will .be seen, from the above description, that when the key O isdriven home the strain of torsion on the shaft will be transferred in agreat measure to the collar or sleeve B, which is made strong enough toresist any strain which the solid portions of-the shaft would sustain.

It will also be seen that the termination ofthe key-slot c at e preventsthis key from being withdrawn while the sleeve B covers the end of thegib. Y

It will also be seen that the transverse segments g g on the gib G, whenfitted into the transverse grooves ff iu the ends of the two abuttingshafts, A A, will prevent these shafts from endwise movement.

Having described my invention,

A shaft-coupling consisting of a gib, G, a slotted key, C, and a sleeve,B, applied to shaft-sections, and constructed substantially asdescribed.

-JAMES H. BLESSIN,G.

Witnesses A. l?. STEVENS, J. A. REED.

